This rebases minikube-iso to the release 2017-02.
A change in buildroot required the introduction of a `external.desc` as
multiple external trees are supported in modern buildroot versions. This
required change is described here [0].
[0] https://buildroot.org/downloads/manual/manual.html#br2-external-converting
The existing isolinux.cfg was not included in the config and thus
ignored, include it.
The 4.9.13 kernel included in buildroot 2017-02 is not compatible with
VBox guest additions 5.1.6, thus bump guest additions to 5.1.18.
The defconfig of 4.9.13 has been cleaned up.
systemd 232 included in buildroot 2017-02 is incompatible with docker <
17.03 without boot parameter systemd.legacy_systemd_cgroup_controller=yes
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Thomas Graf